31 results about "1-Butyl-3-methylimidazolium hexafluorophosphate" patented technology

An improved electrolyte for a cell having an anode comprising magnesium or magnesium alloy. The cell's cathode may desirably include iron disulfide (FeS2) as cathode active material. The improved electrolyte comprises a magnesium salt, preferably magnesium perchlorate dissolved in an organic solvent which preferably includes acetonitrile or mixture of tetrahydrofuran and propylene carbonate. The electrolyte includes an additive to retard the buildup of deleterious passivation coating on the magnesium anode surface, thereby enhancing cell performance. Such additive may preferably include 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), lithium hexafluorophosphate (LiPF6), or aluminum chloride (AlCl3).

The invention discloses a synthesizing method of polyimide. The method comprises the following step that: an aromatic diamine compound and an aromatic dianhydride compound are subject to a polymerization reaction in an ionic liquid, such that polyimide is obtained. The ionic liquid can be any one of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-butyl-3-methylimidazolium trifluoromethanesulfonate. The operation of the method is simple, the product made with the method is easy to purify and has high dissolvability (the product can be dissolved in regular solvents of N, N-dimethylacetamide, or tetrahydrofuran). The method has advantages of high yield, stable performance, good application prospect, and is suitable for industrialized production. Withthe method, polyimide films or fibers can be produced.

The invention provides a preparation method of furfural, and belongs to the technical field of chemical synthesis. According to the method, furfural is obtained in 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) ionic liquid through a one-pot method by taking pentose and biomass as raw materials, taking a polymer-supported sulfonic acid (PEG (polyethylene glycol)-OSO3H, PS (polystyrene)-PEG-OSO3H) as a catalyst and taking manganese chloride as an additive. Therefore, the reaction process is greatly simplified, the production rate is improved, and the production cost is reduced; the catalyst is easy to recover and recycle, and the separation and post-treatment processes are simple; and adopted raw materials and various reagents are non-toxic, the production process is pollution-free, equipment is not corroded, and the method is environment-friendly.

The invention discloses a preparation method and application of a visible light response hydrogen generation photocatalyst GO / SiC / WO3. The preparation method comprises the following steps: a, siliconcarbide (SiC) is pretreated; b, tungsten trioxide (WO3) is taken as a raw material to prepare a 8wt% WO3 solution of a whole hydrothermal reaction system; c, 100 mL of the 8wt% WO3 solution is taken and placed in a beaker, and the SiC, graphene oxide (GO) and two drops of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid are sequentially added, and ultrasonically stirred to be evenly mixed; and d, the mixture is transferred into a high-temperature reaction kettle to react for 20 h at 200 DEG C, then centrifugal washing is conducted till the pH is 7, the mixture is placed in a vacuumdrying box to be subjected to vacuum drying for standby application, and the visible light response hydrogen generation photocatalyst GO / SiC / WO3 is obtained through hydrothermal synthesis. Through the synergistic effect of the double cocatalysts, namely the graphene-like material GO and the non-graphene-like material WO3, and the amphipathicity of the ionic liquid, the visible light response hydrogen generation photocatalyst GO / SiC / WO3 is prepared, the performance of visible light photocatalytic water decomposition for hydrogen generation is improved, and a certain foundation can be laid forsubsequent efficient application of the visible light catalyst.

The invention discloses a 1,4-disubstituted-1,2,3-triazole compound preparation method which comprises the following steps: (1) adding a catalyst inorganic base in an ionic liquid, wherein the catalyst inorganic base is potassium hydroxide or sodium hydroxide, and the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, 1-Buthyl-3-methylidazolium bromide or 1-butyl-3-methylimidazolium hexafluorophosphate; (2) adding raw material phenylacetaldehyde or substituted phenylacetaldehyde and pinacolborane in the mixed system formed in the step (1), reacting under the room temperature at the stirring condition, separating out the solid phase after reaction finishing, extracting diethyl ether, and drying to obtain the 1,4-disubstituted-1,2,3-triazole compound. The preparation method has the advantages that the catalytic system is simple, the operation is convenient, the reaction condition is mild, and reactive solvents can be recycled repeatedly.

The present invention provides a method for detecting the active components of Kunming mountain crabapple based on ionic liquid-ultrasound-assisted-HPLC, wherein the technical key is that the prepared sample is prepared by using 1-butyl-3-methylimidazole hexafluorophosphate The solution is used as an extract to extract Kunming mountain crabapple medicinal materials. The detection efficiency of the method provided by the invention is significantly higher than that of the traditional single-component abbreviation method, and more importantly, the transfer rate of the active ingredient in the process provided by the invention is significantly higher than that of the traditional methanol extraction method, which is effective and avoids detection errors.